/in/foo.cc: In function 'bool cp(st, st)':
/in/foo.cc:15:38: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  return f.zf()>g.zf()||f.zf()==g.zf()&&f.yw>g.yw;
                        ~~~~~~~~~~~~~~^~~~~~~~~~~